Liquidating developed land in Georgia

[Benyamin Nusair]

Hello

I am looking to sell a piece of land in Newton County, Georgia. These are 15 lots for single-family homes, which are part of a larger parcel ID that is not yet subdivided. The other 14 lots in the same parcel ID belong to someone else who bought them for 72,000/Lot at December last year but did not complete the purchase, leaving me with the remaining 15 lots on hand. The work needed to get a final plat, subdivide the land and get the building permits is estimated to cost 450K USD. 

Parcel ID: 0053 000 000 004A00

The 15 lots ALT ID: 0053004A

county website: https://qpublic.schneidercorp.com/Application.aspx?AppID=794&LayerID=11825&PageTypeID=4&PageID=5723&Q=1108277087&KeyValue=0053000000004A00

What do you guys recommend would be the best channel to try and move these lots? These lots came into my hand after a borrower defaulted on a promissory note I issued. I am not a land developer or builder, so not interested to mess with these myself. 

Benji